11987923 has 2 divisors, whose sum is σ = 11987924. Its totient is φ = 11987922.

The previous prime is 11987909. The next prime is 11987951. The reversal of 11987923 is 32978911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11987923 - 2⁵ = 11987891 is a prime.

It is not a weakly prime, because it can be changed into another prime (11987953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5993961 + 5993962.

It is an arithmetic number, because the mean of its divisors is an integer number (5993962).

Almost surely, 2^11987923 is an apocalyptic number.

11987923 is a deficient number, since it is larger than the sum of its proper divisors (1).

11987923 is an equidigital number, since it uses as much as digits as its factorization.

11987923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 11987923 is about 3462.3580115291. The cubic root of 11987923 is about 228.8660187645.

The spelling of 11987923 in words is "eleven million, nine hundred eighty-seven thousand, nine hundred twenty-three".